This document outlines 10 grammar topics that should be studied seriously: 1) grammar definition; 2) 16 tenses; 3) adjective order; 4) causatives; 5) wish and used to; 6) conditional sentences; 7) reported speech; 8) passive voice; 9) sentence structure; and 10) relative clauses.

2. Study these materials seriously!
1. Grammar definition;
2. 16 Tenses;
3. Adjective order;
4. Causatives;
5. Wish and used to;
6. Conditional sentences;
7. Reported speech;
8. Passive voice;
9. Sentence structure;
10. Relatives clause.